基于CHP物理特性等值建模的气-电-热混合能流统一分析方法  

Unified Analysis Method of Gas-electricity-heat Hybrid Energy Flow Based on Physical Characteristic Equivalence Modelling of CHP

作　　者：彭石 谢宁[1] 王承民[1] 田沛川 PENG Shi;XIE Ning;WANG Chengmin;TIAN Peichuan(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Minhang District,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市闵行区200240

出　　处：《中国电机工程学报》2025年第7期2579-2593,I0011,共16页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家重点研发计划项目(2020YFB2104500)。

摘　　要：针对燃气-蒸汽联合循环且余热锅炉不补燃的热电联产机组(combined power and heat unit,CHP),首先,基于能量守恒建立天然气流量与电力电压、电流的等值关系,进而考虑功率进行变换的物理特性,构建CHP的气电变换等效电路;考虑功率进行传递、释放的物理特性,构建CHP的气热转换、烟气排放及运行热损失方程;据此,确立CHP的物理特性等值模型,并定义该模型“以热定电”和“以电定热”策略下的控制参量。其次,利用牛顿法和管网水力计算基本原理,推导电潮流和气、热能流的修正方程及其雅可比元素表达式,提出计及CHP固有特性参数随系统运行状态变化的气-电-热混合能流统一分析方法。最后,通过具有不同CHP控制策略的气-电-热混合系统,验证所提方法的有效性及可行性。For the combined heat and power(CHP)unit featuring a gas-steam combined cycle with an unfired heat recovery boiler,this study establishes fundamental thermodynamic relationships.Firstly,based on energy conservation principles,equivalent relationships between gas mass flow rate and electrical parameters are derived.Subsequently,a comprehensive equivalent circuit model is developed to characterize the gas-to-electricity conversion process,incorporating the physical characteristics of power transformation.Furthermore,mathematical formulations are established to describe the system's gas-heat conversion efficiency,exhaust gas emissions,and operational heat losses,accounting for the thermodynamic principles governing energy transfer and dissipation processes.Accordingly,the CHP’s physical characteristic equivalence model can be established,and its control parameters under strategies of“electricity determined by heat”and“heat determined by electricity”are defined.Then,using the Newton method and the principle of pipe-network hydraulic calculation,the correction equations for the power flow and the energy flows of gas and heat systems,as well as their Jacobian element expressions,are derived,thereby proposing a unified analysis method for gas-electricity-heat hybrid energy flow considering the CHP’s inherent characteristic parameters varying with the operating conditions of the hybrid system.Finally,the effectiveness and feasibility of the proposed method are validated by the gas-electricity-heat hybrid systems with different control strategies of CHP.

关 键 词：燃气-蒸汽联合循环 余热锅炉 气电变换 气热转换 烟气排放 CHP物理特性等值模型 气-电-热混合能流统一分析 

分 类 号：TM611.31[电气工程—电力系统及自动化] TU995[建筑科学—供热、供燃气、通风及空调工程]